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avi: Validate sample_size

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And either error out or set it to 0 if it is negative.

CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Andreas Cadhalpun 2015-05-06 02:26:57 +02:00 committed by Luca Barbato
parent b34257eefd
commit 4d0ee4962b
1 changed files with 17 additions and 0 deletions
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17
libavformat/avidec.c
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@ -571,6 +571,23 @@ static int avi_read_header(AVFormatContext *s)
av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
goto fail;
}
if (ast->sample_size < 0) {
if (s->error_recognition & AV_EF_EXPLODE) {
av_log(s, AV_LOG_ERROR,
"Invalid sample_size %d at stream %d\n",
ast->sample_size,
stream_index);
goto fail;
}
av_log(s, AV_LOG_WARNING,
"Invalid sample_size %d at stream %d "
"setting it to 0\n",
ast->sample_size,
stream_index);
ast->sample_size = 0;
}
if (ast->sample_size == 0)
st->duration = st->nb_frames;
ast->frame_offset = ast->cum_len;